Exhaust brakes not needed with auto transmissions?

[Eric_77]

I wonder if the Dura/Alli combo does like the Nav/Torq combo where they use a variable vane turbo that can actully close off or reverse the vanes thus acting like a exhaust brake with limited back pressure due to the hydraulic valve adjusters.



Anyone heard has Ford/chevy now allowed EB on their engines used to be no-no because of the valve adjusters (Ie hydraulic)?

 

[HBarlow]

klenger

when Trailer Life mag did a article on the dmax/A and PSD/Torque shift they commented on the the trans braking, and noted that folks pullin' over 10000 lb would need a EB as the truck/trailer combo they tested warmed the brakes up real quick going down.

I lurk around on the Ford/GM diesel webs and notice that some that pull heavy have gone to EBs and some without EB have only went down a couple of mountains. I would bet they will be doing brake jobs in 20-25000 miles.

JIM

It's good to read the facts occasionally. That's what I figured was the case.



Harvey

 

[klenger]

I wonder if the Dura/Alli combo does like the Nav/Torq combo where they use a variable vane turbo that can actully close off or reverse the vanes thus acting like a exhaust brake with limited back pressure due to the hydraulic valve adjusters.



Anyone heard has Ford/chevy now allowed EB on their engines used to be no-no because of the valve adjusters (Ie hydraulic)?

If this is the case for Chevy and Ford, it certainly doesn't apply to the CTD (which was what the poster on rv.net was referring to) as we know that Dodge does not use a VVT for any application.